Machine for punching nuts



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Machine for Punching Nuts.

Patented Mar. 9,1880.

2 sheets-Sheet 2 .v W. SHIELDS. Machine for Punching Nut ,s.

No. 225,4-29. Patented Mar. 9, 1880'.

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UNITED STATES WILLIAM SHIELDS, OF PHILADELPHIA, PENNSYLVANIA.

MACHINE FOR PUNCHING NUTS.

SPECIFICATION forming part of Letters Patent No. 225,429,

dated March 9, 1880,

Application filed April 5, 1879.

To all whom it may concern Be it known that 1, WILLIAM SHIELDS, ofPhiladelphia,in the county of Philadelphia and State of Pennsylvania,have invented certain new and useful Improvements in Machines for achingN uts; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it pertains to make and use it, reference being hadto the accompanying drawings, which form part of this specification, inwhich- Figure 1 is a vertical section, and Fig. 2 an elevation.

My invention has for its object to provide means whereby a nut-blank maybe cut and punched at each stroke of the plunger of a nutmaking machine.

My improvement consists in the peculiar construction of the plunger anddie, said plunger having two punches and the die two correspondingopenings, located at such distance apart that the nut-bar will have asupport on the die and be held thereon while being cut and punched, ashereinafter set forth, and will require to be moved a distance equal totwice the length of one side of the nut to bring its punched portionfrom one punch tothe other, the parts named being combined with aholddown, to hold the bar or blank while being cut and to strip theperforating-punch.

Referring to the accompanying drawings, A indicates a plunger-spindle,which is made hollow or formed with a socket, a, for the reception of aspring, B. A is a head on the spindle A, and O a toolstock fastenedtherein.

D is a round punch for forming holes, and

E a square or angular punch for cutting off the blanks from the barwhich is designed to be made into nuts.

F is a stripper and hold-down, consisting of a spindle, f, with shoulderf. Said spindle passes through the tool-stock G and head A, entering thespring B, which passes through the head A and bears down upon theshoulderf, the latter, as shown, being above said tool-stock.

G represents a stationary die having guide blocks 9 g and a gage, g. Ithas also two openings, g 9 corresponding, respectively, to the punches Dand E, and through which the plug out from the bar by the punch D andthe blank out from said bar by the punch E severally pass. The punchesI) E (as well as the .correspondin g die-openings g g are, from centerto center, a distance apart equal to twice the length of one of thesides 6 of the punch E or one of the sides g of the opening g Theoperation is as follows: The bar from which the nuts are to be formed isfed between the guides g g until its end meets the gage g. The plunger Ais now caused to descend by any suitable means-such, for example, as areordinarily employed for the purpose. The lower end of the stripper andhold-down F, which, it will be observed, is below the cutting-faces ofthe punches D E, first meets said bar, holding the latter firmly on thedie G. The punches D E next meet the bar as the plunger descends, thepunch D forming a hole and the punch E cutting oft a square unpunchedblank from the end of said bar. The plunger then rises, the bar beingheld down, however, by the device F until the punch D is stripped ordrawn clear out of the opening just formed in said bar. The plungercontinuing to ascend, the stripper F is lifted clear of the bar, whenthe latter is again fed onward until its end meets the gage g. Thisbrings the hole just punched directly beneath the stripper F, whichlatter is of greater diameter than said hole, so as not to enter thesame. The plunger A again descends, the stripper F meeting and holdingthe bar, the punch D forming another hole, and the punch E cuttingoffanother unpunched blank. The plunger A again ascends, and the punch Dis stripped, as before. The bar is then again fed onward till its endmeets the gage g. This brings the hole first punched directly beneaththe cutoff punch E, so that the latter, at the next stroke of theplunger, will sever a blank having its hole already formed in it. Atevery succeeding stroke of the plunger a complete-- '5. 0., cut andpunched out--blank will be produced and driven through the opening 9 Inother words, a given portion of the nut-bar is first punched, thenbrought beneath the stripper and held on the die, and then fed forwardlya distance equal to the length of one side of the blanks, and then cutoft, the punching of holes and cutting off of punched-out blanks being,however, simultaneous, so that after two unpunched blanks are firstsevered a complete punched and out blank is produced at each stroke ofthe plunger.

The advantage of placing the punches and die-openings the describeddistance apart is that it permits the simultaneous operation of saidpunches, while at the same time the bar is supported on the die betweenthem while the punching and cutting are proceeding, and held down whilethe perforating-punch is ascending.

The bar from which the blanks are cut may be fed either hot or cold, andof such width that its rough edges Will be cut off by punch E.

Although I have described my invention as a means for punching andcutting nuts, I do not limit myself to this application, since it isobvious it may be used as well for washers and all sorts of perforatedangular blanks.

What I claim as my invention is 1. In a nut or washer machine, thecombination of a perforating-punch anda cuttingoff punch located apart,center to center, from each other a distance equal to the diameter oftwo nuts or washers to be cut 0E, and a die with matrices relatively solocated, with a hold-down between said punches and operating to hold thebar or blank upon said die while being cut and punched and to strip theperforating-punch, substantially as set forth. 2. The combination ofplunger A, having spring B, punches D E, and stripper or holddown F,with die Gr, having openings g 9 said stripper being located betweensaid punches and operating to hold the nut-bar on the die between theopenings in the latter, as set forth. 3. In combination with hollow orsocketed spindle A, spring B, head A, tool-stock O, punches D E, andhold-down or stripper F, the stationary die G, having guides g g, gageg, and openings 9 substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this26th day of March, 1879.

WILLIAM SHIELDS. Witnesses:

M. D. OoNNoLLY, CHAS. F. VAN HORN.

